The Pastor of my Old Church Tried to Re-Convert Me Yesterday

Consider the destruction at Sodom and Gomorrah. Abraham was advised ahead of time, and an "escape plan" was arranged for the few righteous.

There's a fundamental difference. In that case, it was an act of God. He was in control of the events, and he could forewarn Abraham, Lot, etc. The Tsunami was not act of God. It was simply a natural calamity.